Basically, there exists a fungus in nature (or rather, a number of them) that infect insect hosts and sometimes influence the host's brain in order to reproduce.
I built one for BBCC 66
(for those who have not yet voted in the contest, please consider these images as opposed to my entry picture, which was taken with poor lighting)
(votes are greatly appreciated)
Edited by Paleo, Nov 27 2013 - 10:51 PM.